公开(公告)号：US20220199985A1

公开(公告)日：2022-06-23

申请号：US17690148

申请日：2022-03-09

Applicant: Ningde Amperex Technology Limited

Inventor： Ting ZHANG ,  Zhihuan CHEN ,  Daoyi JIANG ,  Hang CUI

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/62

Abstract: An anode material includes silicon-based particles, the silicon-based particles include a silicon-containing substrate, at least a part of the surface of the silicon-containing substrate has: (i) a polymer layer, and/or (ii) an amorphous carbon layer, and the polymer layer or the amorphous carbon layer includes carbon nanotubes, the silicon-based particles include metal elements, the metal elements include Fe, Cu, Zn, Ni, Co, or any combination thereof; wherein the content of the metal elements selected from Fe, Cu, Zn, Ni, Co, or any combination thereof is less than about 2500 ppm based on the total weight of the silicon-based particles. A lithium ion battery with the anode active material has a reduced impedance and K value, and improved first efficiency and cycle performance.

公开(公告)号：US20230006265A1

公开(公告)日：2023-01-05

申请号：US17940395

申请日：2022-09-08

Applicant: Ningde Amperex Technology Limited

Inventor： Ting ZHANG ,  Daoyi JIANG ,  Hang CUI

IPC: H01M10/0587 ,  H01M10/0525 ,  H01M50/46 ,  H01M4/505 ,  H01M4/525 ,  H01M4/38 ,  H01M4/58 ,  H01M10/04 ,  H01M10/44 ,  H01M50/417 ,  H01M50/426

Abstract: A lithium-ion battery, including a battery cell, an electrolytic solution, and a packaging film. The battery cell is formed by winding a positive electrode plate and a negative electrode plate that are separated by a separator. The lithium-ion battery is half-charged to obtain a half-charged full battery. The half-charged full battery is stripped of the packaging film to obtain a half-charged cell. When a width of the half-charged full battery is w1, a width of the half-charged cell is w2, and g=w2/w1, the following conditional expression (1) is satisfied: 0.4

公开(公告)号：US20220223854A1

公开(公告)日：2022-07-14

申请号：US17708501

申请日：2022-03-30

Applicant: Ningde Amperex Technology Limited

Inventor： Daoyi JIANG ,  Zhihuan CHEN ,  Ting ZHANG ,  Hang CUI

IPC: H01M4/38 ,  H01M4/62 ,  H01M4/134

Abstract: A negative electrode material includes silicon-based particles. The silicon-based particles include a silicon-containing matrix and a polymer layer disposed on at least a portion of a surface of the silicon-containing matrix, and the polymer layer includes a carbon material and a polymer; when a thermogravimetric analysis is conducted at a temperature ranging from 0° C. to 800° C., a derivative thermogravimetric curve of the polymer in a free state has at least one characteristic peak, a temperature at the maximum characteristic peak of the at least one characteristic peak is Ti, a derivative thermogravimetric curve of the silicon-based particles has at least one characteristic peak, a temperature at the maximum characteristic peak of the at least one characteristic peak is T2, and T1-T2 is from 1.5° C. to 20° C. A lithium-ion battery prepared from the negative active material has improved cycle performance and deformation resistance, and reduced DC resistance.

公开(公告)号：US20220199986A1

公开(公告)日：2022-06-23

申请号：US17690159

申请日：2022-03-09

Applicant: Ningde Amperex Technology Limited

Inventor： Ting ZHANG ,  Daoyi JIANG ,  Zhihuan CHEN ,  Hang CUI

IPC: H01M4/36 ,  H01M4/62 ,  H01M4/48 ,  H01M10/0525

Abstract: A negative electrode material includes silicon-based particles. The silicon-based particles include a silicon-containing substrate and a polymer layer. The polymer layer exists on at least a part of a surface of the silicon-containing substrate. The polymer layer includes carbon nanotubes and alkali metal ions. The alkali metal ions include Li+, Na+, K+, or any combination thereof. Based on a total weight of the silicon-based particles, a content of the alkali metal ions is approximately 50˜5,000 ppm. A lithium-ion battery prepared by using the negative active material achieves a lower resistance, higher first-time efficiency, higher cycle performance, and higher rate performance.